New poll shows Harris gaining in states where Biden was behind

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    New poll shows Harris gaining in states where Biden was behind

    01:43

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A new poll shows Vice President Kamala Harris gaining ground on or surpassing former President Donald Trump in Arizona, North Carolina, Nevada, and Georgia compared to where President Biden had been in the same survey. NBC News’ Vaughn Hillyard is on the campaign trail in Pennsylvania covering the latest Trump rally in the battleground state as well as the plans for the upcoming Democratic National Convention.